Just like a wet suit is used to keep stable temperatures for the body inside of it, the 1 Liter Water Wetsuit will do the same for your water! This one liter bottle insulator that's made of high quality neoprene (wet suit rubber material) comes with an adjustable shoulder strap (no belt clip). If you need empty, blank water bottles that are BPA-free, those can be included with your order. Quench your advertising campaign's thirst for a great product!